A Pro Patria presentation produced by British Instructional Films Ltd. Secrets of Nature - Phantoms.
Shot of a pond then a close up of what looks like a leaf on the water's surface. It is a cluster of gnat eggs. Underwater shot of the eggs hatching downwards into the water. Spiral of eggs in...
Rubbish piles up as street cleaners go on strike in Philadelphia and a small team has to tackle the mess. America.
Mechanical road cleaners and ploughs could make horse drawn vehicles a thing of the past.
Ray Anton is window cleaner by day and pop singer at night (one of series for youngsters).
London streets cleaner displays his skills in New York and amuses New Yorkers.
Item about three women washing peoples car around streets of London.
The Cole-Vac cleans airfield at Wright-Patterson Air Force Base in America.
View of the Hoover factory building in Perivale. A detailed look at the manufacturing process.
A detailed look inside the Hoover Factory at the manufacturing process.